4 Wire Trailer Diagram. The remaining wires get installed underneath. The white wire is your ground wire, which must be cut short and attached to the front of your trailer frame with a screw to power your lights.
Check out or trailer wiring diagrams for a quick reference on trailer wiring.
This is a short video series of the steps that I have taken to refurbish and old Utility Trailer that was designed and built by my father.
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To make this tutorial easier to understand, I will be. This topic is a great deal of individuals browsing on the net. This color trailer wiring diagram will help you when you need to connect your trailer to your truck's wiring harness or repair a wire that isn't working.